This is WP Page Builder: Free website builder for WordPress
You can design and build beautiful websites individually- without writing any kind of line of code. This WordPress page home builder has a great deal of website building aspects such as ready design templates, blocks, collection system to save your very own design, and also a number of addons to power a functional & full-fledged web site.
Discover more and Download: https://wordpress.org/plugins/wp-pagebuilder/
See Demo: https://builder.themeum.com/